Symptoms of a bad mass air flow sensor are hesitation, surging, poor fuel economy, poor performance, black smoke, and difficulty starting the engine. Fault codes indicating misfires, and rich or lean air/fuel mixture are also common. And in some cases, the engine will often stall, and you will see a check engine light. Here are a few reasons you might be experiencing symptoms of a bad mass air flow sensor: Contamination: Dirt, dust, or debris can accumulate on the sensor's wire or film, impairing its function and causing false readings. Exposure to water or oil: When moisture from water or oil vapor enters the intake system, it can coat the MAF sensor. The most common signs of bad mass air flow sensor (MAF) in Toyota Tundra are loss of power or slow acceleration, engine hesitation or jerking during acceleration, erratic idling, misfires, poor exhaust emission values and sometimes black smoke comes out of the tailpipe. The mass air flow sensor is part of the engine’s intake system and is The SAP makes a click click sound at cold startup and runs from round about 30-40 sec. today i took out the hose from the sap and could not feel any air coming out of the sap but there was little air coming out from the check valve.Lastly i monitored the pre cat 02 sensor and they are jumping between 0.8 and 0.1 and not constant like the post The most common signs of bad mass air flow sensor (MAF) in VW Passat are loss of power or slow acceleration, engine hesitation or jerking during acceleration, erratic idling, misfires, poor exhaust emission values and sometimes black smoke comes out of the tailpipe. The mass air flow sensor is part of the engine’s intake system and is located The mass airflow sensor (commonly abbreviated to MAF) is one of the most important engine management sensors. A bad mass airflow sensor can leave your Chevy Equinox's engine running rough, or even inoperable. A MAF sensor measures the density of the air entering the intake manifold. It passes this information onto your Equinox's ECU. Delphi AF10058 Mass Air Flow Sensor. dummy. GM Genuine Parts 19330121 Mass Airflow Sensor with Intake Air Temperature Sensor. dummy. Delphi AF10057 Mass Air Flow Sensor. dummy. Mass Air Flow Sensor Meter Compatible with Chevy Silverado GMC Sierra MAF Sensor Replace 25318411 25168491 AF10043 (5 Prong) Try again! Details. These are the several factors that can cause the P0175 code to appear. A clogged or leaking fuel injector. Fuel regulator failure. A clogged or defective mass air-flow sensor. Defective coolant temperature sensor. Thermostat malfunction. ECM requires reprogramming. Unclean or faulty oxygen sensor. 6. Sluggish Acceleration. Slow acceleration and poor fuel economy could be signs that your Mass Airflow (MAF) sensor needs replacing. The MAF sensor is responsible for informing the engine’s computer how much air is entering the engine, so if it’s faulty, the car won’t be able to adjust itself and will run inefficiently. Common Symptoms of a BAD Ford MAF Sensor This is not the most definitive list on the subject, but does cover the majority of symptoms I've seen on these types of Ford Mass Air Flow Sensors: 1) MAF Codes that light up the CHECK ENGINE LIGHT (CEL) on your Instrument Cluster. P0102 MAF Signal Low Input to PCM. P0103 MAF Signal High Input to PCM. dotHPP.